Tengo un recyclerView dentro de mi aplicación que puede cargar videos e imágenes. Estoy usando la biblioteca ExoPlayer para cargar videos en mi vista de reciclador. El problema es que a veces ExoPlayer muestra una pantalla negra en lugar de cargar el video. Intenté registrar la URL del video desde firebase y no es nula o algo así.

Estoy usando esta biblioteca: https://github.com/HamidrezaAmz/MagicalExoPlayer

Nota: este problema apareció cuando implementé la paginación (cargar más publicaciones en el desplazamiento) con firebase y recyclerView .

Fragmento de mi hogar:

 public class HomeFragment extends Fragment { LoadingDialog progressDialog; final DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference(); boolean isSearchOpen = false; private EditText searchView; ArrayList<PostModel> postModelArrayList; ArrayList<PostModel> loadedPostsArrayList; RecyclerView recyclerView; PostRecyclerAdapter recyclerAdapter; int lastLoadedIndex = 0; void loadMorePosts() { // Load 4 post's per time for (int i = 0; i < 3; i++) { if (lastLoadedIndex + 1 < postModelArrayList.size()) { PostModel postModel = postModelArrayList.get(lastLoadedIndex + 1); loadedPostsArrayList.add(postModel); recyclerAdapter.notifyDataSetChanged(); lastLoadedIndex = lastLoadedIndex + 1; } } } void loadAllPosts(View fragmentView) { DatabaseReference postsRef = FirebaseDatabase.getInstance().getReference("posts"); postsRef.addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange(@NonNull DataSnapshot snapshot) { new Handler().postDelayed(() -> { fragmentView.findViewById(R.id.constraintLayout2).setVisibility(View.GONE); HomeActivity.bottomNavBar.setVisibility(View.VISIBLE); HomeActivity.showLoadingScreen = false; }, 1200); for (DataSnapshot postSnapshot : snapshot.getChildren()) { PostModel postModel = postSnapshot.getValue(PostModel.class); // Show post in recycler adapter only if the user is not blocked if (!snapshot.child("users").child(FirebaseAuth.getInstance().getCurrentUser().getUid()).child("blockedUsers").child(postSnapshot.child("name").getValue(String.class)).exists()) { postModelArrayList.add(postModel); } recyclerAdapter.notifyDataSetChanged(); } // Reverse elements inside postModelArrayList Collections.reverse(postModelArrayList); // Load first 3 post's for (int i = 0; i < 3; i++) { loadedPostsArrayList.add(postModelArrayList.get(i)); lastLoadedIndex++; } } @Override public void onCancelled(@NonNull DatabaseError error) { Toast.makeText(getContext(), "Error: " + error.getMessage(), Toast.LENGTH_SHORT).show(); } }); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_home, container, false); SwipeRefreshLayout swipeRefreshLayout = view.findViewById(R.id.root_view); TextView usernameLoadingScreen = view.findViewById(R.id.textView40); ImageButton searchUserBtn = view.findViewById(R.id.searchPersonButton); ImageButton notificationsBtn = view.findViewById(R.id.notificationsButton); ImageButton searchUserButton = view.findViewById(R.id.enter_search_button); View postsOfTheMonthBtn = view.findViewById(R.id.posts_of_the_month_btn); searchView = view.findViewById(R.id.search_view); recyclerView = view.findViewById(R.id.home_recycler_view); loadedPostsArrayList = new ArrayList<>(); final LinearLayoutManager layoutManager = new LinearLayoutManager(getContext()); recyclerAdapter = new PostRecyclerAdapter(loadedPostsArrayList, getContext(), getActivity()); recyclerView.setAdapter(recyclerAdapter); recyclerView.setLayoutManager(layoutManager); progressDialog = LoadingDialog.Companion.get(getActivity()); searchView.setVisibility(View.GONE); searchUserButton.setVisibility(View.GONE); if (HomeActivity.showWhatsNewMessage) { FirebaseInAppMessaging.getInstance().triggerEvent("new_version_open"); } // Avoid data refresh on every swipe down recyclerView.setOnScrollChangeListener((v, scrollX, scrollY, oldScrollX, oldScrollY) -> swipeRefreshLayout.setEnabled(scrollY <= 5)); // Re-load data swipeRefreshLayout.setOnRefreshListener(() -> { swipeRefreshLayout.setRefreshing(true); loadAllPosts(view); swipeRefreshLayout.setRefreshing(false); }); recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); loadMorePosts(); } }); HomeActivity.bottomNavBar.setVisibility(View.GONE); loadAllPosts(view); return view; } }

Mi PostRecyclerAdapter:

 public class PostRecyclerAdapter extends RecyclerView.Adapter { List<PostModel> postList; Context context; Activity activity; @Override public int getItemViewType(int position) { if (postList.get(position).getPostType().equals("video")) { return 1; } return 0; } public void addAll(List<PostModel> newPosts) { int initSize = postList.size(); postList.addAll(newPosts); notifyItemRangeChanged(initSize, postList.size()); } public String getLastItemID() { return postList.get(postList.size() - 1).getId(); } public PostRecyclerAdapter(ArrayList<PostModel> postModelArrayList, Context context, Activity activity) { this.postList = postModelArrayList; this.context = context; this.activity = activity; } @NonNull @Override public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { if (viewType == 1) { return new VideoViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.post_video_item, parent, false)); } return new ImageViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.post_item, parent, false)); } @Override public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) { DatabaseReference likeRef = FirebaseDatabase.getInstance().getReference("likes"); FirebaseAuth mAuth = FirebaseAuth.getInstance(); FirebaseUser user = mAuth.getCurrentUser(); if (postList.get(position).getPostType().equals("video")) { // bind video view holder VideoViewHolder videoViewHolder = (VideoViewHolder) holder; videoViewHolder.setContext(context); // check if post is liked or not likeRef.addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange(@NonNull @NotNull DataSnapshot snapshot) { if (!HomeActivity.anonymous) { // check if current post is liked from this user if (snapshot.child(videoViewHolder.id).hasChild(user.getUid())) { // post is liked form this user videoViewHolder.like_btn.setImageResource(R.drawable.ic_thumb_up_filled); } else { // post is not liked from this user videoViewHolder.like_btn.setImageResource(R.drawable.ic_thump_up_outline); } } else { // disable like button videoViewHolder.like_btn.setEnabled(false); } } @Override public void onCancelled(@NonNull @NotNull DatabaseError error) { Toast.makeText(context, "error: " + error, Toast.LENGTH_SHORT).show(); } }); // Get current post id set username, authorID, profile picture URL, postType, likes and post image URL videoViewHolder.id = postList.get(position).getId(); videoViewHolder.username.setText(postList.get(position).getName()); videoViewHolder.userID = postList.get(position).getAuthorID(); videoViewHolder.like_counter_tv.setText(postList.get(position).getLikes()); videoViewHolder.videoURL = postList.get(position).getImgUrl(); // Load video source HashMap<String, String> extraHeaders = new HashMap<>(); extraHeaders.put("foo", "bar"); videoViewHolder.andExoPlayerView.setSource(postList.get(position).getImgUrl(), extraHeaders); videoViewHolder.andExoPlayerView.setPlayWhenReady(false); videoViewHolder.andExoPlayerView.setAspectRatio(EnumAspectRatio.ASPECT_16_9); // Load profile picture String profilePictureUrl = postList.get(position).getProfileImgUrl(); if (profilePictureUrl != null) { if (!profilePictureUrl.equals("none")) { Glide.with(context).load(profilePictureUrl).into(videoViewHolder.profilePicture); } } } else { // bind image view holder ImageViewHolder imageViewHolder = (ImageViewHolder) holder; imageViewHolder.setContext(context); // check if post is liked or not likeRef.addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange(@NonNull @NotNull DataSnapshot snapshot) { if (!HomeActivity.anonymous) { // check if current post is liked from this user if (snapshot.child(imageViewHolder.postID).hasChild(user.getUid())) { // post is liked form this user imageViewHolder.like_btn.setImageResource(R.drawable.ic_thumb_up_filled); } else { // post is not liked from this user imageViewHolder.like_btn.setImageResource(R.drawable.ic_thump_up_outline); } } else { // disable like button imageViewHolder.like_btn.setEnabled(false); } } @Override public void onCancelled(@NonNull @NotNull DatabaseError error) { Toast.makeText(context, "error: " + error, Toast.LENGTH_SHORT).show(); } }); // Get current post id set username, authorID, profile picture URL, postType, likes and post image URL imageViewHolder.postID = postList.get(position).getId(); imageViewHolder.username.setText(postList.get(position).getName()); imageViewHolder.userID = postList.get(position).getAuthorID(); imageViewHolder.like_counter_tv.setText(postList.get(position).getLikes()); Picasso.get().load(postList.get(position).getImgUrl()).into(imageViewHolder.postImg); imageViewHolder.postImageURL = postList.get(position).getImgUrl(); // Load profile picture String profilePictureUrl = postList.get(position).getProfileImgUrl(); if (profilePictureUrl != null) { if (!profilePictureUrl.equals("none")) { Glide.with(context).load(profilePictureUrl).into(imageViewHolder.profileImage); } } } } @Override public int getItemCount() { return postList.size(); } }

Mi video_post_item.xml:

 <?xml version="1.0" encoding="utf-8"?> <androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/video_container" android:layout_width="match_parent" android:layout_height="wrap_content" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_margin="12dp" app:cardElevation="8dp" app:cardCornerRadius="10dp"> <androidx.constraintlayout.widget.ConstraintLayout android:id="@+id/sContainer" android:layout_width="match_parent" android:background="?attr/cardBackgroundColor" android:layout_height="wrap_content"> <de.hdodenhof.circleimageview.CircleImageView android:id="@+id/circleImageView2" android:layout_width="35dp" android:layout_height="35dp" android:layout_marginStart="8dp" android:layout_marginTop="8dp" android:layout_marginEnd="8dp" android:src="@drawable/user" app:layout_constraintEnd_toStartOf="@+id/textView27" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> <TextView android:id="@+id/textView27" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginStart="8dp" android:text="username" android:textColor="?attr/titleTextColor" android:textSize="17sp" android:textStyle="bold" app:layout_constraintBottom_toBottomOf="@+id/circleImageView2" app:layout_constraintStart_toEndOf="@+id/circleImageView2" app:layout_constraintTop_toTopOf="@+id/circleImageView2" /> <com.potyvideo.library.AndExoPlayerView android:id="@+id/andExoPlayerView" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" app:andexo_show_full_screen="true" app:keep_content_on_player_reset="true" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/textView27" app:layout_constraintVertical_bias="1.0" /> <ImageButton android:id="@+id/imageButton8" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginEnd="15dp" android:background="@null" app:layout_constraintBottom_toBottomOf="@+id/textView27" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintTop_toTopOf="@+id/textView27" app:srcCompat="@drawable/ic_thumb_up" /> <TextView android:id="@+id/textView36" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginEnd="8dp" android:text="0" android:textColor="?attr/titleTextColor" android:textSize="18sp" android:textStyle="bold" app:layout_constraintBottom_toBottomOf="@+id/imageButton8" app:layout_constraintEnd_toStartOf="@+id/imageButton8" app:layout_constraintTop_toTopOf="@+id/imageButton8" /> <View android:id="@+id/view5" android:layout_width="200dp" android:layout_height="55dp" android:focusable="true" android:foreground="?selectableItemBackgroundBorderless" app:layout_constraintBottom_toTopOf="@+id/andExoPlayerView" app:layout_constraintEnd_toEndOf="@+id/textView27" app:layout_constraintStart_toStartOf="@+id/circleImageView2" app:layout_constraintTop_toTopOf="parent" /> </androidx.constraintlayout.widget.ConstraintLayout> </androidx.cardview.widget.CardView>